Then quit the job in ASDA and start working as microprocessors/microchip programmer.

The point of learning this at school/university is to:
a) understand dependencies between various factors of complex phenomenons i.e. in electronics, acoustics, stress engineering (strength of materials), etc.
AND
b) to train your brain – just like you can train muscles. By applying weights that that you wouldn’t meet in real life and into muscles that you wouldn’t use in real life. All that purely to look good and not to be a hotel-boy.

If you still don’t get it then you should have gone to work in the age of 7 instead of to school cause you have wasted tax payers/your parents monies.